// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
//
// Copied from
// https://github.com/awslabs/aws-glue-data-catalog-client-for-apache-hive-metastore/blob/branch-3.4.0/
//

package com.amazonaws.glue.catalog.metastore;

import com.google.common.util.concurrent.ThreadFactoryBuilder;
import org.apache.hadoop.conf.Configuration;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class DefaultExecutorServiceFactory implements ExecutorServiceFactory {
    private static final int NUM_EXECUTOR_THREADS = 5;

    private static final ExecutorService GLUE_METASTORE_DELEGATE_THREAD_POOL = Executors.newFixedThreadPool(
            NUM_EXECUTOR_THREADS, new ThreadFactoryBuilder()
                    .setNameFormat(GlueMetastoreClientDelegate.GLUE_METASTORE_DELEGATE_THREADPOOL_NAME_FORMAT)
                    .setDaemon(true).build()
    );

    @Override
    public ExecutorService getExecutorService(Configuration conf) {
        return GLUE_METASTORE_DELEGATE_THREAD_POOL;
    }
}
